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https://www.readbyqxmd.com/read/28926341/maternal-plasma-lpcat-1-mrna-correlates-with-lamellar-body-count
#1
Robert A Welch, Maurice-Andre Recanati, Kathryn C Welch, Michael K Shaw
Human lysophosphatidylcholine acyltransferase 1 (hLPCAT1) is a protein which helps produce surfactant in the fetal lung. We previously reported that levels of cell-free fetal mRNA for hLPCAT1 in amniotic fluid are correlated with lamellar body count (LBC) (r2=0.93). This short communication demonstrates that fetal hLPCAT1 mRNA is also present in maternal blood. Its quantity also correlates with amniotic fluid LBC (r2=0.81). Research in maternal plasma hLPCAT1 may assist in understanding fetal and placental maturational processes...
September 19, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28922633/protein-extraction-into-the-bicontinuous-microemulsion-phase-of-a-water-sds-pentanol-dodecane-winsor-iii-system-effect-on-nanostructure-and-protein-conformation
#2
Douglas G Hayes, Ran Ye, Rachel N Dunlap, Matthew J Cuneo, Sai Venkatesh Pingali, Hugh M O'Neill, Volker S Urban
Bicontinuous microemulsions (BμEs), consisting of water and oil nanodomains separated by surfactant monolayers of near-zero curvature, are potentially valuable systems for purification and delivery of biomolecules, for hosting multiphasic biochemical reactions, and as templating media for preparing nanomaterials. We formed Winsor-III systems by mixing aqueous protein and sodium dodecyl sulfate (SDS) solutions with dodecane and 1-pentanol (cosurfactant) to efficiently extract proteins into the middle (BμE) phase...
September 7, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28922348/stem-cell-biology-and-regenerative-medicine-for-neonatal-lung-diseases
#3
REVIEW
Martin Kang, Bernard Thébaud
Lung diseases remain one of the main causes of morbidity and mortality in neonates. Cell therapy and regenerative medicine have the potential to revolutionize the management of life-threatening and debilitating lung diseases that currently lack effective treatments. Over the past decade, the repair capabilities of stem/progenitor cells has been harnessed to prevent/rescue lung damage in experimental neonatal lung diseases. Mesenchymal stromal cells and amnion epithelial cells exert pleiotropic effects and represent ideal therapeutic cells for bronchopulmonary dysplasia, a multifactorial disease...
September 18, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28916727/inflammatory-responses-induce-an-identity-crisis-of-alveolar-macrophages-leading-to-pulmonary-alveolar-proteinosis
#4
Risa Ebina-Shibuya, Mitsuyo Matsumoto, Makoto Kuwahara, Kyoung-Jin Jang, Manabu Sugai, Yoshiaki Ito, Ryo Funayama, Keiko Nakayama, Yuki Sato, Naoto Ishii, Yasunobu Okamura, Kengo Kinoshita, Kohei Kometani, Tomohiro Kurosaki, Akihiko Muto, Masakazu Ichinose, Masakatsu Yamashita, Kazuhiko Igarashi
Pulmonary alveolar proteinosis (PAP) is a severe respiratory disease characterized by dyspnea caused by accumulation of surfactant protein. Dysfunction of alveolar macrophages (AMs), which regulate the homeostasis of surfactant protein, leads to the development of PAP, for example, in mice lacking BTB and CNC homology 2 (Bach2). However, how Bach2 helps prevent PAP is unknown, and cell-specific effects of Bach2 are undefined. Using mice lacking Bach2 in specific cell types, we found that the PAP-phenotype of Bach2-deficient mice is due to Bach2 deficiency in more than two types of immune cells...
September 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28915062/a-recombinant-fragment-of-human-surfactant-protein-d-suppresses-basophil-activation-th2-and-b-cell-responses-in-grass-pollen-induced-allergic-inflammation
#5
Asif S Qaseem, Iesha Singh, Ansar A Pathan, Janice A Layhadi, Rebecca Parkin, Fedina Alexandra, Stephen R Durham, Uday Kishore, Mohamed H Shamji
RATIONALE: rfhSP-D has been shown to suppress house dust mite and Aspergillus fumigatus-induced allergic inflammation in murine models. OBJECTIVES: We sought to elucidate the effect of rfhSP-D on FcεRI and CD23-mediated grass pollen induced allergic inflammatory responses. METHODS: rfhSP-D, containing homotrimeric neck and lectin domains, was expressed in Escherichia coli BL21 (λDE3) pLysS. PBMCs and sera were obtained from grass pollen allergic individuals (n=27)...
September 15, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28910374/expression-of-surfactant-protein-b-is-dependent-on-cell-density-in-h441-lung-epithelial-cells
#6
Markus Fehrholz, Silvia Seidenspinner, Steffen Kunzmann
BACKGROUND: Expression of surfactant protein (SP)-B, which assures the structural stability of the pulmonary surfactant film, is influenced by various stimuli, including glucocorticoids; however, the role that cell-cell contact plays in SP-B transcription remains unknown. The aim of the current study was to investigate the impact of cell-cell contact on SP-B mRNA and mature SP-B expression in the lung epithelial cell line H441. METHODS: Different quantities of H441 cells per growth area were either left untreated or incubated with dexamethasone...
2017: PloS One
https://www.readbyqxmd.com/read/28902364/functional-roles-of-c-ebp%C3%AE-and-sumo%C3%A2-modification-in-lung-development
#7
Yuan-Dong Chen, Jiang-Yan Liu, Yan-Min Lu, Hai-Tao Zhu, Wei Tang, Qiu-Xia Wang, Hong-Yan Lu
CCAAT enhancer binding protein alpha (C/EBPα) is a transcription factor regulating the core aspects of cell growth and differentiation. The present study investigated the level and functional role of C/EBPα during the development of the rat lung. C/EBPα protein exhibits a dynamic expression pattern. The correlation between the expression of C/EBPα protein and the content of glycogen during lung maturation was analyzed to understand the function of C/EBPα in lung differentiation. The high expression of C/EBPα coincides with the reduction of glycogen in the fetal lung...
August 29, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28901673/catanionic-coacervate-micro-droplets-as-a-surfactant-based-membrane-free-protocell-model
#8
Jean-Paul Douliez, Nicolas Martin, Stephen Mann, Cédric Gaillard, Thomas Beneyton, Jean-Christophe Baret, Laure Beven
We report on the formation of surfactant complex catanionic coacervate micro-droplets in mixtures of decanoic acid and cetyl pyridinium chloride or cetyl trimethyl ammonium bromide. We show that coacervation occurs over a broad range of composition, pH and ionic strength. The catanionic coacervates consist of elongated micelles, sequester a wide range of solutes including water-soluble organic dyes, polysaccharides, proteins, enzymes and DNA, and can be structurally stabilized by sodium alginate or gelatin-based hydrogelation...
September 13, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28888561/delayed-presentation-and-prolonged-survival-of-a-child-with-surfactant-protein-b-deficiency
#9
Juan A López-Andreu, Antonio D Hidalgo-Santos, Miguel A Fuentes-Castelló, Nuria Mancheño-Franch, Juan A Cerón-Pérez, Maria J Esteban-Ricós, Laia Pedrola-Vidal, Lawrence M Nogee
Surfactant protein B encoding gene mutations have been related to early onset fatal respiratory distress in full-term neonates. We report a school-aged male child homozygous for a surfactant protein B encoding gene missense mutation who presented after the neonatal period. His respiratory insufficiency responded to high dose intravenous methylprednisolone and hydroxychloroquine.
September 6, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28887370/genome-reprogramming-in-saccharomyces-cerevisiae-upon-nonylphenol-exposure
#10
Ceyhun Bereketoglu, Kazim Yalcin Arga, Serpil Eraslan, Bulent Mertoglu
Bioaccumulative environmental estrogen, nonylphenol (NP; 4-nonylphenol), is widely used as a non-ionic surfactant and can affect human health. Since genomes of Saccharomyces cerevisiae and higher eukaryotes share many structural and functional similarities, we investigated subcellular effects of NP on S. cerevisiae BY4742 cells by analyzing genome-wide transcriptional profiles. We examined effects of low (1 mg/L NP) and high (5 mg/L NP) inhibitory concentration exposures for 120 or 180 min. After 120 and 180 min of 1 mg/L NP exposure, 187 (63 downregulated, 124 upregulated) and 103 genes (56 downregulated, 47 upregulated), respectively, were differentially expressed...
September 8, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/28887056/quantification-of-volume-and-lipid-filling-of-intracellular-vesicles-carrying-the-abca3-transporter
#11
Stefanie Höppner, Susanna Kinting, Adriano A Torrano, Ulrike Schindlbeck, Christoph Bräuchle, Ralf Zarbock, Thomas Wittman, Matthias Griese
The ABCA3 lipid transporter is located in the limiting membrane of lamellar bodies (LBs) in type-II-pneumocytes. Mutations within the ABCA3 gene may functionally impair the transporter, causing lung diseases in newborns, children and adults. Assays to quantify volume and lipid filling of the LBs on the level of the vesicular structures and thereby assess the function of ABCA3 are still lacking. In the present study human influenza haemagglutinin- (HA-) tagged wild type and mutant ABCA3 proteins were stably expressed in lung A549 cells...
September 5, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28886512/physicochemical-study-of-biomolecular-interactions-between-lysosomotropic-surfactants-and-bovine-serum-albumin
#12
Tomasz Janek, Żaneta Czyżnikowska, Jacek Łuczyński, Eduardo J Gudiña, Lígia R Rodrigues, Joanna Gałęzowska
The interactions between two cationic lysosomotropic surfactants (2-dodecanoyloxyethyl)trimethylammonium bromide (DMM-11) and (2-dodecanoyloxypropyl)trimethylammonium bromide (DMPM-11) with bovine serum albumin (BSA) in Hepes buffer (pH=7.4) were systematically studied by surface tension, fluorescence and circular dichroism (CD) spectroscopy and isothermal titration calorimetry (ITC). Furthermore, the size of the micellar aggregates and the polydispersity indexes of both cationic surfactants were studied by dynamic light scattering technique (DLS)...
August 30, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28881145/secondhand-tobacco-smoke-and-severity-in-wheezing-children-nasal-oxidant-stress-and-inflammation
#13
Ozge Yilmaz, Ahmet Turkeli, Ece Onur, Sema Bilge, Hasan Yuksel
OBJECTIVES: Prenatal and postnatal smoke exposures are associated with many lung diseases in children due to impaired lung function, increased inflammation, and oxidative stress. We aimed to determine the influence of secondhand tobacco smoke exposure on the levels of nasal glutathione, IL-8, IL-17, MMP-9, and TIMP-1, as well as serum surfactant protein-D (SP-D) in wheezy children. METHODS: We enrolled 150 children with recurrent wheezing and recorded wheezing characteristics at enrollment...
September 7, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28878025/gallbladder-derived-surfactant-protein-d-regulates-gut-commensal-bacteria-for-maintaining-intestinal-homeostasis
#14
Hana Sarashina-Kida, Hideo Negishi, Junko Nishio, Wataru Suda, Yuki Nakajima, Mika Yasui-Kato, Keiko Iwaisako, Sujin Kang, Nobuyasu Endo, Hideyuki Yanai, Masataka Asagiri, Hiroshi Kida, Masahira Hattori, Atsushi Kumanogoh, Tadatsugu Taniguchi
The commensal microbiota within the gastrointestinal tract is essential in maintaining homeostasis. Indeed, dysregulation in the repertoire of microbiota can result in the development of intestinal immune-inflammatory diseases. Further, this immune regulation by gut microbiota is important systemically, impacting health and disease of organ systems beyond the local environment of the gut. What has not been explored is how distant organs might in turn shape the microbiota via microbe-targeted molecules. Here, we provide evidence that surfactant protein D (SP-D) synthesized in the gallbladder and delivered into intestinal lumen binds selectively to species of gut commensal bacteria...
September 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28877748/a-pilot-clinical-trial-of-recombinant-human-angiotensin-converting-enzyme-2-in-acute-respiratory-distress-syndrome
#15
Akram Khan, Cody Benthin, Brian Zeno, Timothy E Albertson, John Boyd, Jason D Christie, Richard Hall, Germain Poirier, Juan J Ronco, Mark Tidswell, Kelly Hardes, William M Powley, Tracey J Wright, Sarah K Siederer, David A Fairman, David A Lipson, Andrew I Bayliffe, Aili L Lazaar
BACKGROUND: Renin-angiotensin system (RAS) signaling and angiotensin-converting enzyme 2 (ACE2) have been implicated in the pathogenesis of acute respiratory distress syndrome (ARDS). We postulated that repleting ACE2 using GSK2586881, a recombinant form of human angiotensin-converting enzyme 2 (rhACE2), could attenuate acute lung injury. METHODS: We conducted a two-part phase II trial comprising an open-label intrapatient dose escalation and a randomized, double-blind, placebo-controlled phase in ten intensive care units in North America...
September 7, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28877030/radiation-mitigating-properties-of-intranasally-administered-kl4-surfactant-in-a-murine-model-of-radiation-induced-lung-damage
#16
Melpo Christofidou-Solomidou, Ralph A Pietrofesa, Evguenia Arguiri, Constantinos Koumenis, Robert Segal
The threat of exposure to ionizing radiation from a nuclear reactor accident or deliberate terrorist actions is a significant public health concern. The lung is particularly susceptible to radiation-induced injury from external sources or inhalation of radioactive particles from radioactive fallout. Radiation-induced lung disease can manifest with an acute radiation pneumonitis and/or delayed effects leading to pulmonary fibrosis. As prior warning of radiation exposure is unlikely, medical countermeasures (MCMs) to mitigate radiation-induced lung disease that can be given in mass-casualty situations many hours or days postirradiation are needed to prevent both early and late lung damage...
September 6, 2017: Radiation Research
https://www.readbyqxmd.com/read/28875146/importance-of-serial-changes-in-biomarkers-in-idiopathic-pulmonary-fibrosis
#17
Akihiko Sokai, Kiminobu Tanizawa, Tomohiro Handa, Kumiko Kanatani, Takeshi Kubo, Kohei Ikezoe, Yoshinari Nakatsuka, Shinsaku Tokuda, Toru Oga, Toyohiro Hirai, Sonoko Nagai, Kazuo Chin, Michiaki Mishima
The clinical significance of serial changes in serum biomarkers in patients with idiopathic pulmonary fibrosis (IPF) remains to be established. This retrospective study was conducted to clarify the associations of serial changes in serum Krebs von den Lungen-6 (KL-6) and surfactant protein-D (SP-D) with changes in physiological indices and overall mortality in IPF. The study subjects were 75 patients with IPF. The 6 month change in serum KL-6 was significantly correlated with changes in the percentage of the predicted forced vital capacity (FVC % pred) and the percentage of the predicted diffusing capacity of the lung for carbon monoxide (% DLCO), while the 6 month change in serum SP-D was correlated only with % DLCO...
July 2017: ERJ Open Research
https://www.readbyqxmd.com/read/28873200/mac-1-deficiency-induces-respiratory-failure-by-affecting-type-i-alveolar-epithelial-cells
#18
J Wang, Y B Ci, C L Liu, H M Sun
As a β2 integrin family member, Mac-1 plays an important role in the inflammatory response. Inflammation and lung injury are closely associated, but the involvement of Mac-1 in the occurrence and development of such pathologies remains poorly understood. We aimed to investigate the relationship between Mac-1 deficiency and respiratory failure in Mac-1 knockout {Mac-1(-/-)} mice, using C57BL/6J mice as a control. The newborn survival rate of Mac-1(-/-) mice was calculated, and mouse lung tissue was treated with hematoxylin and eosin and subjected to immunofluorescent staining...
August 31, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28872861/an-entropic-anomaly-observed-in-lipid-polymorphisms-induced-by-surfactant-peptide-sp-b-1-25
#19
Nhi Tran, Justin J Kurian, Avni Bhatt, Robert McKenna, Joanna R Long
The N-terminal 25 amino-acid residues of pulmonary surfactant protein B (SP-B1-25) induces unusual lipid polymorphisms in a model lipid system, 4:1 DPPC/POPG, mirroring the lipid composition of native pulmonary surfactant. It is widely suggested that SP-B1-25 induced lipid polymorphisms within the alveolar aqueous subphase provide a structural platform for rapid lipid adsorption to the air-water interface. Here, we characterize in detail the phase behavior of DPPC and POPG in hydrated lipid assemblies containing therapeutic levels of SP-B1-25 using (2)H and (31)P solid state NMR spectroscopy...
September 5, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28865477/rig-i-overexpression-decreases-mortality-of-cigarette-smoke-exposed-mice-during-influenza-a-virus-infection
#20
Xiaoqiu Wang, Wenxin Wu, Wei Zhang, J Leland Booth, Elizabeth S Duggan, Lili Tian, Sunil More, Yan D Zhao, Ravindranauth N Sawh, Lin Liu, Ming-Hui Zou, Jordan P Metcalf
BACKGROUND: Retinoic acid-inducible gene I (RIG-I) is an important regulator of virus-induced antiviral interferons (IFNs) and proinflammatory cytokines which participate in clearing viral infections. Cigarette smoke (CS) exposure increases the frequency and severity of respiratory tract infections. METHODS: We generated a RIG-I transgenic (TG) mouse strain that expresses the RIG-I gene product under the control of the human lung specific surfactant protein C promoter...
September 2, 2017: Respiratory Research
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